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/* Copyright (c) 2021 ARM Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_API_ABI_HASH_CRC32_H_
#define ODP_API_ABI_HASH_CRC32_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
uint32_t _odp_hash_crc32_generic(const void *data, uint32_t data_len,
uint32_t init_val);
uint32_t _odp_hash_crc32c_generic(const void *data, uint32_t data_len,
uint32_t init_val);
#ifdef __ARM_FEATURE_CRC32
#include <arm_acle.h>
static inline uint32_t _odp_hash_crc32(const void *data_ptr, uint32_t data_len,
uint32_t init_val)
{
uint32_t i;
uintptr_t pd = (uintptr_t)data_ptr;
for (i = 0; i < data_len / 8; i++) {
init_val = __crc32d(init_val, *(const uint64_t *)pd);
pd += 8;
}
if (data_len & 0x4) {
init_val = __crc32w(init_val, *(const uint32_t *)pd);
pd += 4;
}
if (data_len & 0x2) {
init_val = __crc32h(init_val, *(const uint16_t *)pd);
pd += 2;
}
if (data_len & 0x1)
init_val = __crc32b(init_val, *(const uint8_t *)pd);
return init_val;
}
static inline uint32_t _odp_hash_crc32c(const void *data, uint32_t data_len,
uint32_t init_val)
{
uint32_t i;
uintptr_t pd = (uintptr_t)data;
for (i = 0; i < data_len / 8; i++) {
init_val = __crc32cd(init_val, *(const uint64_t *)pd);
pd += 8;
}
if (data_len & 0x4) {
init_val = __crc32cw(init_val, *(const uint32_t *)pd);
pd += 4;
}
if (data_len & 0x2) {
init_val = __crc32ch(init_val, *(const uint16_t *)pd);
pd += 2;
}
if (data_len & 0x1)
init_val = __crc32cb(init_val, *(const uint8_t *)pd);
return init_val;
}
#else /* __ARM_FEATURE_CRC32 */
/*
* Fall back to software implementation
*/
static inline uint32_t _odp_hash_crc32(const void *data, uint32_t data_len,
uint32_t init_val)
{
return _odp_hash_crc32_generic(data, data_len, init_val);
}
static inline uint32_t _odp_hash_crc32c(const void *data, uint32_t data_len,
uint32_t init_val)
{
return _odp_hash_crc32c_generic(data, data_len, init_val);
}
#endif
#ifdef __cplusplus
}
#endif
#endif
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